* {
    margin: 0;
    padding: 0;
}

.box {
    width: 100%;
    height: 800px;
    background: url(./img/login-background.jpg);
    overflow: hidden;
}

.box .box1 {
    width: 400px;
    height: 400px;
    background-color: #ffffff;
    border-radius: 10px;
    margin: 200px auto;
}

.box .box1 .nav {
    width: 400px;
    height: 50px;
    text-align: center;
    line-height: 50px;
    font-size: 20px;
    margin-top: 20px;
    border-radius: 10px 10px 0px 0px;
}

input {
    width: 300px;
    outline: none;
    height: 35px;
    border-radius: 5px;
    margin-left: 45px;
    margin-top: 30px;
    border: 0;
    border: 1px solid #ccc;
}

button {
    width: 300px;
    height: 40px;
    text-align: center;
    background-color: #87cefa;
    border: 0;
    line-height: 40px;
    color: aliceblue;
    border-radius: 5px;
    margin-left: 50px;
    margin-top: 20px;
}

.line a {
    text-decoration: none;
    color: #555;
    margin-left: 220px;
}